forked from Bananymous/banan-os
118 lines
3.2 KiB
C++
118 lines
3.2 KiB
C++
#include <LibGUI/Widget/RoundedWidget.h>
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namespace LibGUI::Widget
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{
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bool RoundedWidget::contains(Point point) const
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{
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if (!Widget::contains(point))
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return false;
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const auto is_outside_corner =
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[this]<uint8_t quadrant>(Point point) -> bool
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{
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const auto radius = m_style.corner_radius;
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const uint32_t base_x = (quadrant % 2) ? m_texture.width() - radius - 1 : 0;
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const uint32_t base_y = (quadrant / 2) ? m_texture.height() - radius - 1 : 0;
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if (point.x < static_cast<int32_t>(base_x) || point.x > static_cast<int32_t>(base_x + radius))
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return false;
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if (point.y < static_cast<int32_t>(base_y) || point.y > static_cast<int32_t>(base_y + radius))
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return false;
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const uint32_t x_off = point.x - base_x;
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const uint32_t y_off = point.y - base_y;
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const uint32_t dx = ((quadrant % 2) ? x_off : radius - x_off);
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const uint32_t dy = ((quadrant / 2) ? y_off : radius - y_off);
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const uint32_t distance = dx * dx + dy * dy;
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return distance >= radius * radius;
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};
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if (is_outside_corner.operator()<0>(point))
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return false;
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if (is_outside_corner.operator()<1>(point))
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return false;
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if (is_outside_corner.operator()<2>(point))
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return false;
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if (is_outside_corner.operator()<3>(point))
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return false;
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return true;
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}
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void RoundedWidget::show_impl()
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{
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if (m_style.border_width)
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{
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m_texture.fill_rect(
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0,
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0,
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m_texture.width(),
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m_style.border_width,
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m_style.color_border
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);
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m_texture.fill_rect(
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0,
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0,
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m_style.border_width,
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m_texture.height(),
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m_style.color_border
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);
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m_texture.fill_rect(
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0,
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m_texture.height() - m_style.border_width,
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m_texture.width(),
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m_style.border_width,
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m_style.color_border
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);
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m_texture.fill_rect(
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m_texture.width() - m_style.border_width,
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0,
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m_style.border_width,
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m_texture.height(),
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m_style.color_border
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);
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}
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if (m_style.corner_radius)
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{
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const auto draw_corner =
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[this]<uint8_t quadrant>()
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{
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const auto radius = m_style.corner_radius;
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const uint32_t base_x = (quadrant % 2) ? m_texture.width() - radius - 1 : 0;
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const uint32_t base_y = (quadrant / 2) ? m_texture.height() - radius - 1 : 0;
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const uint32_t distance_max = radius * radius;
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const uint32_t distance_min = (radius - m_style.border_width) * (radius - m_style.border_width);
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for (uint32_t y_off = 0; y_off <= radius; y_off++)
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{
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for (uint32_t x_off = 0; x_off <= radius; x_off++)
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{
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const uint32_t dx = ((quadrant % 2) ? x_off : radius - x_off);
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const uint32_t dy = ((quadrant / 2) ? y_off : radius - y_off);
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const uint32_t distance = dx * dx + dy * dy;
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if (base_x + x_off >= m_texture.width())
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continue;
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if (base_y + y_off >= m_texture.height())
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continue;
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if (distance > distance_max)
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m_texture.set_pixel(base_x + x_off, base_y + y_off, color_invisible);
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else if (distance >= distance_min)
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m_texture.set_pixel(base_x + x_off, base_y + y_off, m_style.color_border);
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}
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}
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};
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draw_corner.operator()<0>();
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draw_corner.operator()<1>();
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draw_corner.operator()<2>();
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draw_corner.operator()<3>();
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}
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}
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}
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